JPH068638B2 - Blower device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a blower device used as, for example, an air-conditioning unit for an automobile air conditioner, and more specifically, assembling a motor cover with a flange used in the blower device. Regarding the structure.

[Conventional technology]

A motor used in a blower device such as an automobile air conditioner is generally attached to a blower casing (scroll casing) via a motor supporting flange.

The conventional motor supporting flange of this type is generally made of metal, and is fixed to the outer periphery of the motor housing by spot welding or the like as disclosed in, for example, Japanese Utility Model Publication Nos. 5583410 and 61-3105. It was

In addition, recently, as disclosed in Japanese Utility Model Laid-Open No. 63-85514, there has been proposed one in which a flange is not made of metal and is integrally molded with a synthetic resin together with a motor cover that covers the outer periphery of the motor housing.

[Problems to be Solved by the Invention]

Among the above-mentioned conventional techniques, the one in which the flange is made of metal has the flange fixed to the motor housing by welding, so that the motor has always been on the market as a motor with a flange, and the compatibility of the flange has been lacking.

Without such compatibility, the flange has various sizes and shapes depending on the type of automobile, which makes it difficult to standardize the motor and integrate the models, thus lowering the productivity.

On the other hand, the resin cover with the flange is different from the above-mentioned metal flange in that the motor cover with the flange is detachably assembled to the motor, which has the advantage of being compatible with the above-mentioned productivity. You can solve the problem. Also, since the motor cover covers almost the entire motor, it is evaluated as having excellent sound insulation of the motor.

However, when the flange and the motor cover are integrally formed, there has been a problem in how the motor and the motor cover can be assembled easily and without rattling.

For example, in the blower device of Japanese Utility Model Laid-Open No. 63-85514, a ring-shaped elastic body is interposed between the inner and outer circumferences of the motor cover and the motor, but in this method, the motor and motor cover are made vertical. When arranged, the load impact of the motor cannot be fully supported. Therefore, a protrusion is usually provided on the elastic body, and a small hole is provided on the motor cover. However, this method requires the work of winding the elastic body around the motor housing, the work of aligning the projections and the small holes, and the like, the assembly work is relatively troublesome, and the increase in parts such as the elastic body causes the high cost. I was crying. In addition, a method of attaching the motor cover to the motor with screws or the like is also proposed, but in this case, there is no sufficient consideration how to prevent rattling due to vibration of the motor, etc. There was a problem in terms of measures.

The present invention has been made in view of the above points, and an object thereof is to improve the productivity of a blower device, and to simplify the assembly work of the device, reduce weight, and reduce noise. is there.

[Means for Solving the Problems]

The present invention takes the following means to achieve the above object.

The basic problem solving means according to the present invention is roughly classified into the following 2
Represented by the street. Hereinafter, in order to facilitate understanding of the contents, reference will be made to the reference numerals of the embodiments of FIGS. 1 and 6.

One basic solution (hereinafter referred to as the first solution)
1 includes a motor 2 for driving the fan 1 and a blower casing 4 having the fan 1 built therein, and the motor 2 is attached to the blower casing 4 via a flange 6. In, there is a cylindrical motor cover 5 that covers the outer periphery of the motor housing 2a and supports the motor 2, and a flange 6 is provided on the outer periphery of the motor cover 5, and the motor cover 5 and the flange 6 are made of synthetic resin or compound material. The motor cover 5 is integrally formed, and at the same time, the motor housing 2a is provided with a locking portion 5c that holds the motor housing 2a at least on one end surface in the axial direction, and the motor cover 5 is divided into two parts. While sandwiching the motor housing 2a between them, the motor cover dividing elements 5a and 5b are connected to each other via a coupling member. That.

Further, another means for solving the problem (referred to as a second means for solving) will be described with reference to the reference numeral in FIG.
In the case where the blower motor 2 is attached to the blower casing 4 via the flange 6 similarly to the above-mentioned first solution means, a cylindrical motor cover 5 for fitting and supporting the motor 2 is provided.
A flange 6 is provided on the outer periphery of the motor cover 5, the motor cover 5 and the flange 6 are integrally molded with a synthetic resin or a compound material, and at least the housing 2a of the motor 2 on the inner peripheral surface of the motor cover 5 is provided. A plurality of press-fitting allowance projections 12 for press-fitting and fitting the motor are formed in a portion covering the outer peripheral surface.
Is pressed against the outer peripheral surface of the housing 2a of the motor 2 in the motor cover 5, and the motor 2 is prevented from coming off from the motor cover 5 via an appropriate coupling member such as a screw or a locking member.

[Action]

According to the present invention having such a configuration, the following actions are performed by the first solving means.

First, when assembling the motor cover 5 with the flange 6 to the motor 2, when the motor cover 5 is assembled, the split element 5
Each of a and 5b is fitted into the motor housing 2a via a dividing surface (opening) A. In this case, even if the motor cover 5 has the locking member 5c, the fitting of the cover 5 to the motor 2 can be performed through the dividing surface A of the cover, so that the locking member 5c does not interfere. Then, by fitting the fitted cover dividing elements 5a and 5b to each other with a connecting member such as a screw, the cover dividing elements 5a and 5b are self-locked to the axial end surface 2b of the motor housing 2a via the locking portion 5c of the motor cover 5, and assembled. The attachment is completed. In this case, the cover dividing elements 5a and 5b
The motor housing 2a can be clamped by the tightening force of the coupling member, and can be fixed to the motor 2 without rattling.

Further, the motor 2 is mounted by fixing the flange 6 of the motor cover 5 thus assembled to the blower casing 4. Since the motor 2 is almost entirely covered by the cylindrical motor cover 5 (5a, 5b), the noise of the motor is shielded, and the rattling of the motor cover 5 is prevented as described above, so that the blower device has a low level. Noise reduction is achieved. Further, the weight of the flange 6 is reduced by about 20% with respect to the metal flange.

Next, the operation of the second solving means will be described.

First, when assembling the motor cover 5 with the flange 6 to the motor 2, the motor 2 is fitted through the one end opening 5'of the motor cover 5. In this case, the press-fitting margin is set on the inner peripheral surface of the motor cover 5. Since a plurality of protrusions 12 are formed, fitting by press fitting is performed. That is, the inner side of the motor cover 5 before the motor is fitted is narrower than the outer diameter of the motor housing 2a by the press-fitting margin of the protrusion 12.
When the motor 2 is press-fitted, the press-fitting margin of the protrusion 12 is crushed or scraped off, and the protrusion 12 is pressed against the outer peripheral surface of the motor housing 2a. Then, the motor cover 5 is directly tightened to the motor with a connecting member 20 such as a screw or locked with a locking member to complete the assembly.

The second solution has an excellent advantage particularly in that the projection 12 with a press-fitting margin is provided on the inner peripheral surface of the motor cover 5.

That is, the motor housing 2a is usually formed by performing deep drawing several times on a single metal plate, but the housing surface is corrugated only for the deep drawing process, and the outer diameter dimension is complete. It does not become a perfect circle. On the other hand, the motor cover 5
When is made of synthetic resin, its inner diameter is slightly tapered for injection molding in order to remove the product from the mold.
For this reason, the press-fitting connection of the inner and outer diameters of both is not a perfect circular connection, and if the inner diameter of the motor cover 5 itself is made narrower than the outer diameter of the motor housing to provide a press-fitting margin, an unreasonable force is applied to the press-fitting. Then, the resin (motor cover) 5 side is deformed and cracked in a portion having low strength and rigidity.

In this problem solving means, in order to eliminate such a problem, the inner diameter of the motor cover 5 is made larger than the outer diameter of the motor housing 2a so that the inner peripheral surface of the motor cover 5 is weaker than the outer diameter of the motor. Protrusions 12 are provided as a press-fitting allowance for dried fish.

Due to the presence of the projection 12, the motor 2 can be press-fitted into the motor cover 5, and the press-fitting margin of the projection 12 is crushed during the press-fitting, so that the difference in inner and outer diameters between the motor cover 5 and the motor 2 is absorbed. , The motor cover 5 is not deformed or cracked, and both members are fitted tightly with each other without play.

The protrusion 12 is pressed against the outer periphery of the motor housing 2a to prevent rattling between the motor 2 and the motor cover 5 and to perform a reliable assembly.

In addition, the motor noise shielding and the weight reduction of the flange by this means for solving problems are made in the same manner as the first means for solving problems.

In summary, the above first and second solutions are summarized as follows. In the first solution, the divided cover elements 5a and 5b sandwich the motor housing 2a, while the second solution is obtained.
The means for solving the problem is that the projection 12 with a press-fitting margin is used for the motor cover 5.
The motor cover 5 is pressed against the motor housing outer circumference 2a in the motor cover 5 while absorbing the difference between the inner and outer circumferences of the motor 2 and the motor 2. It can be assembled (fixed), and both can prevent rattling of the blower device with a simple structure. Also, assembling of the motor cover 5 to the motor 2 is achieved by tightening the cover elements 5a and 5b with a coupling member such as a screw in the first solution without winding an elastic body around the motor housing as in the conventional case. The locking piece 5c is naturally retained by the motor housing 2a. On the other hand, in the second solution, if the motor cover 5 is attached to the motor 2 with a screw or the like, or the locking member is engaged, the assembly is completed. Therefore, the assembling work can be simplified.

Moreover, since the motor cover with the flange is easily assembled, the compatibility of the flange with the motor can be provided.

The press-fitting allowance projections 12 used in the second solving means can be formed on the inner circumference of the motor housing used in the first solving means. In this case, the flanged motor is further improved. It can be fixed firmly.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a longitudinal sectional view showing the first embodiment with a different viewing angle from FIG. And part B enlarged view, part 4
The drawing is a sectional view taken along the line I-I of FIG.

The present embodiment is a blower device for an automobile, in which 1 is a fan, 2 is a motor, 3 is an inside / outside air switching box, 4 is a scroll casing (blower casing), 5 is a motor cover, and 6 is a flange.

The fan 1 is axially mounted on the motor 2 and is housed in the scroll casing 4.

The motor cover 5 has a cylindrical shape with a bottom, and one end (upper end) in the axial direction thereof is opened to expose a part of the motor 2 to the outside, and an inward locking piece 5c is formed on the periphery of the opening. It Further, the motor cover 5 is integrally molded with a flange 6 provided on the outer periphery of the motor cover 5, and is divided into covers 5a and 5b based on the dividing surface A. Cover 5a,
5b is divided in a direction perpendicular to the axial direction of the cover to present a so-called lateral cracking structure, and the division location A is tapered spigot portions 13a, 13b as shown in the enlarged view of B portion in FIG.
Is formed and a spigot fitting is performed.

In addition, the cooling air introduction port 15 provided in the motor housing 2a is provided at a part of the divided portions of the covers (dividing elements) 5a and 5b.
And a notch 5e that fits into the connector 7 of the motor are formed.

As shown in FIG. 2 and FIG. 3, three screw insertion portions 8 and 9 are provided on the outer circumferences of the covers 5a and 5b, respectively. By inserting the screws 10 into the insertion portions 8 and 9, Cover 5
It is possible to combine a and 5b. Reference numeral 11 is a ring-shaped elastic body interposed between the lower end surface of the motor housing 2 and the inside of the cover 5b.

Reference numeral 12 denotes a linear protrusion formed on the inner circumference of the cover 5a. The protrusion 12 is formed to face the axial direction of the cover as shown in FIG. 2, and each protrusion 12 is arranged at a predetermined interval in the circumferential direction. Has been done. The protrusion 12 is for press-fitting the motor 2 into the motor cover 5, and a slight press-fitting margin is set on the inner diameter side thereof. That is, as shown in FIG.
A portion 12 'on the inner side of the one-dot chain line C of the projection 12 (the one-dot chain line C represents the outer diameter of the motor housing) serves as a press-fitting margin.
Before fitting the motor, this press-fitting margin 12 'is secured, the inner space of the motor cover 5 is slightly narrower than the outer diameter dimension D of the motor housing 2a, and the motor 2 is press-fitted into the motor cover 5. It is set so that it can be fitted.

A cooling air pipe 14 connects a fan downstream side 16 in the scroll casing 4 and a cooling air introduction port (joint) 15 provided in the motor housing 2a.

17 is a cooling air outlet provided at one end of the motor housing 2a,
Reference numeral 18 denotes a plurality of circular ring-shaped projections provided on the bottom portion on the cover 5b side.

Here, the assembling of the motor 2, the motor cover 5, and the like having such a configuration will be described.

First, at the time of assembly, the cover element 5 covering the motor 2
The a and 5b are fitted so as to sandwich the motor 2 from above and below. This fitting involves press fitting because there is a press fitting allowance projection 12 on the inner peripheral surface of the cover 5a that covers the outer periphery of the motor housing. That is, by this press-fitting, the press-fitting margin 1 of the protrusion 12 is
2'is crushed and the projection 12 is pressed against the outer periphery of the motor housing 2a. An elastic body 11 is incorporated into the bottom of the other cover 5b, and is interposed between the bottom of the motor housing 2a and the inside of the cover 5b when the cover 5b is fitted.
When the covers 5a and 5b are joined together with the screws 10 in this state, the cover locking portion 5c is locked to the one end surface 2b of the motor housing by the tightening force, and the motor cover 5
Is locked out.

Although the assembling is completed in this way, in this embodiment, the motor covers 5a, 5b sandwich the motor 2 from the axial direction by the tightening force of the screw 10, so that the motor covers 5a,
The rattling can be eliminated by fixing 5b to the motor 2 completely. Further, in this embodiment, since the projection 12 with the press-fitting margin presses against the motor housing 2a, the play between the motor cover and the motor 2 is eliminated, and the cover 5a,
The rattling of 5b can be prevented more effectively.

Further, since a plurality of circular ring-shaped protrusions 12 are formed on the surface of the cover 5b on which the elastic body 11 is interposed, when the covers 5a and 5b are tightened with the screw 10, the end surface of the elastic body 11 is appropriately formed. Since the motor 2 is pressurized, the impact force can be absorbed even when the motor 2 receives vehicle vibration.

Therefore, according to the present embodiment, the flanged motor cover 5 is used.
The vibration resistance of the blower is improved, and the cover is assembled without rattling. Moreover, the motor cover 5 covers almost the entire motor 2 and shields the motor noise. obtain.

FIG. 7 shows the shielding sound effect of the motor cover 5, in which the smudging portion is a reduced portion. According to FIG. 7, it can be seen that the harmonics are completely shielded at about 12 KHz or more.

Also, when assembling the flanged motor cover, the motor cover 5 is automatically locked by the locking portion 5c only by tightening the screw, and the assembling work can be simplified.

Furthermore, since the flange 6 is not fixed to the motor itself by welding or the like and is attached to the removable motor cover 5, the flange 6 can be made compatible with each other. The difference in shape is eliminated, and standardization and integration are performed, which greatly improves productivity. Further, since the flange is made of synthetic resin or a compound material instead of it, the weight can be reduced.

Next, cooling of the motor 2 will be described.

In FIG. 1, inside the motor 2, the cooling pipe 14 and the joint 1 are arranged from the fan downstream side 16 of the casing 4.
Cooling air is introduced via 5 to cool the inside of the motor and then discharged from the small holes 17. FIG. 5 shows a second embodiment of the present invention. In the figure, the same reference numerals as in the first embodiment indicate the same or common elements.

The present embodiment has the same basic configuration of the motor 2 and the motor cover 5 as the first embodiment, but has the following features as different points.

That is, in this embodiment, the passage 20 for guiding the cooling air from the scroll casing 4 is formed integrally with the motor cover 5 instead of the cooling pipe (separate part) 14 as in the first embodiment, and the motor cover 5 and A vertically divided structure is adopted in which the cooling air passage 20 is divided into two in each axial direction, and the vertically divided cover elements are connected by screws.

According to such vertical division, even when the cooling air passage 20 is integrally formed with the motor cover 5, the motor cover 5 can be easily demolded.

In the first embodiment, the motor cover 5 is divided at right angles to the cover axial direction. However, in such division, it is difficult to perform die cutting because the motor cover and the cooling air passage are integrally molded. Therefore, separate parts such as the cooling pipe 14 and the joint 15 were used.

Here, the cooling air passage 20 is arranged so that the cooling air introduction port 15 ′ provided in the lower portion of the motor 2 and the cooling air intake port 23 of the scroll casing 4 communicate with each other. In addition, the cooling air passage 20 is provided with a water stop groove (water reservoir) 22 in the air passage near the cooling air intake 23, and a protection wall 21 for dust, foreign matter and the like. As shown in the figure, the protective wall 21 has a similar function by providing a plurality of convex portions arranged in a staggered pattern without providing the water stop groove 22. With such a configuration, even if air is taken in from the lower surface of the casing even if the opening of the cooling air passage is not guided to the upper surface of the casing 4 as shown in FIG. Is removed, the motor can be operated safely.
Further, this makes the cooling air passage length extremely short and improves the assemblability of the blower device.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, the motor cover 5 and the flange 6 are integrally molded with a synthetic resin or a compound material in comparison with the first and second embodiments. Although common, the motor cover 5 is not divided into two,
The difference is that the motor cover 5 is directly connected to the housing 2a of the motor 2 with a screw 24.

Further, in this embodiment, the motor 2 is fitted from one end of the cover 5, and a linear press-fitting protrusion 12 extending in the cover axial direction is circumferentially formed on the inner peripheral surface of the motor cover 5. Many are arranged.

This projection 12 is the same as that already adopted in the first embodiment, so that rattling between the motor and the motor cover can be prevented. Further, the presence of the projection 12 prevents a problem that the resin cover 5 on the resin side is deformed or cracked when the motor cover and the motor are press-fitted and fitted, as described in detail in the section [Operation] of the invention. In this embodiment, the motor cover 5 is coupled to the motor via the screw 24. Instead of this, the motor cover 5 is locked to the motor by using an appropriate locking means to prevent the motor from coming off. May come. Further, the projections 12 may be scattered instead of being linear, and the shape may be designed appropriately.

〔The invention's effect〕

As described above, according to the present invention, the motor cover is divided into the motor housing and sandwiched between the motor housings, or alternatively, the protrusions with the press-fitting margin are used on the inner circumference of the motor cover, so that the motor cover has a simple structure. The housing can be assembled tightly without rattling, and the motor cover shields the motor noise. Therefore, the synergistic effect of these can effectively reduce the noise of the blower device. Further, since the compatibility of the flanges improves the productivity of the blower device, and the cover can be easily assembled to the motor, the assembly work of the device can be simplified and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a blower device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 shows the blower device of the first embodiment in a different view from FIG. FIG. 4 is a vertical cross-sectional view and an enlarged view of part B thereof, FIG. 4 is a cross-sectional view taken along the line II of FIG.
FIG. 6 is a vertical sectional view showing a second embodiment of the present invention, FIG. 6 is a vertical sectional view showing a third embodiment of the present invention, and FIG. 7 is a motor sound of a flanged motor cover used in each of the above embodiments. It is an experimental data figure which shows the shielding effect. 1 ... Juan, 2 ... Motor, 2a ... Motor housing, 4
... Blower casing (scroll), 5 ... Motor cover, 5a, 5b ... Cover dividing element, 5c ... Locking part, 6 ...
Flange, 10 ... Coupling member (screw), 11 ... Elastic body, 1
Reference numeral 2 is a projection with a press-fitting margin, 14 is a cooling air pipe, 15 is a cooling air introduction port, 20 is a cooling air passage, 21 is a protective wall, 22 is a recess for water, 24 is a coupling member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Hashimoto 2520, Takaba, Katsuta-shi, Ibaraki, Sawa Plant, Hitachi, Ltd. (72) Mitsuo Ujiya, 3085, Nishikonai, Higashiishikawa, Hitachi, Katsuta, Ibaraki 5 Hitachi AUTOMOTIVE ENGINEERING CO., LTD. In-house company (56) References Actually open 62-52299 (JP, U) Actually open 50-128102 (JP, U) Actual public 45-28511 (JP, Y1)

Claims (7)

[Claims] 1. A motor for driving a fan, and a blower casing containing the fan, wherein the motor is mounted to the blower casing via a flange. The motor housing is supported by covering the outer periphery of the motor housing. A cylindrical motor cover is provided, the flange is provided on the outer periphery of the motor cover, and the motor cover and the flange are integrally molded with a synthetic resin or a compound material, and at least one end of the motor cover has an axial direction of the motor housing. The motor cover is divided into two parts, and the motor cover divided elements are connected to each other via a coupling member while the motor housing is sandwiched between the divided elements of the motor cover. Blower device characterized by 2. The motor according to claim 1, wherein the motor is arranged vertically and a ring-shaped elastic body for supporting a motor load is interposed between a lower end surface of the motor housing and an inner side of the motor cover. Blower device. 3. The motor housing according to claim 1 or 2, wherein the motor housing is provided with an inlet for introducing cooling air therein, and the inlet and the blower casing are connected via a cooling pipe. A blower device in which the motor cover is divided into two parts in the cover axial direction or in the direction perpendicular to the cover axial direction, and a cutout that fits into the introduction port is provided in a part of the divided part. 4. The motor housing according to claim 1, wherein the motor housing is provided with an inlet for introducing cooling air, and the motor cover is provided with the inlet and the blower casing. A cooling air passage for communicating with the inside is provided, the cooling air passage and the motor cover are integrally formed, and the motor cover and the cooling air passage are divided into two in the axial direction in the form of vertical cracks. Blower device. 5. The blower device according to claim 4, wherein a part of the cooling air passage is provided with a recess for water storage, and a protective wall for preventing passage of dust, foreign matter and the like. . 6. Any one of claims 1 to 3
In the paragraph, the motor cover is divided into two at a right angle to the cover axial direction, and at least a portion of the inner peripheral surface of the cover dividing element which covers the outer peripheral surface of the motor housing,
A blower device having a plurality of protrusions having a press-fitting margin for fitting the motor in a press-fitted state. 7. A motor for driving a fan, and a blower casing containing the fan, wherein the motor is attached to the blower casing via a flange. A tubular shape for fitting and supporting the motor. And a flange is provided on the outer periphery of the motor cover, and the motor cover and the flange are integrally molded with a synthetic resin or a compound material, and at least the inner periphery of the motor cover has an outer periphery of the motor housing. A plurality of press-fitting protrusions for press-fitting the motor are formed in a portion covering the surface, and these protrusions are in pressure contact with the outer peripheral surface of the motor housing in the motor cover, and the motor is The motor cover is prevented from coming off through an appropriate coupling member such as a screw or a locking member. And a blower device.